Prolonged exposure to any noise above 80 decibels (e.g. lawnmowers, large groups of people) can cause hearing damage. The louder the noise, the faster it will cause hearing damage. Noises as loud as 110 decibels (e.g. fireworks, car horns honking in close proximity) can cause immediate hearing damage. Thanks to their isolation, these earmuffs have a single-number rating (SNR) of 27, which provides reliable protection for sensitive children's ears.